But that’s exactly what it faced after the Soviet Union collapsed. Living conditions slid, TB cases rose and budget funds wither

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问题    But that’s exactly what it faced after the Soviet Union collapsed. Living conditions slid, TB cases rose and budget funds withered to the【C1】______ where prison administrators could barely provide their charges 【C2】______ the necessary 2, 800 daily calories. The scarcity of medicine created【C3】______ danger. " We have half the medicine we need," says Ludmilla Neshumae, 【C4】______ director at the holding center in Ulan-Ude, in Buryatia, along the eastern【C5】______ of Lake Baikal. "But we do what we can with it. " Such【C6】______ good intentions make fertile ground for drug-resistant TB strains, which【C7】______ when antibiotics don’t kill all of the bacteria, and those that【C8】______ develop an immunity to drugs. So far this year, 94 percent of the【C9】______ in Buryatia with active TB were found to carry drug-resistant type.
【C8】

选项 A、retain
B、remain
C、regain
D、remove

答案B

解析 答案是B。请注意空前and those that三个词在此句中的意味,然后再看空后develop an immunity to drugs的暗示,相信选择B项的原因就会显得更加充分了。
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